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INSTALLATION AND OPERATION MANUAL
FDX70E(A,B)(M,S)1
MULTI-PROTOCOL RS232/422/485
POINT-TO-POINT DATA TRANSCEIVER
The ComNet™ FDX70E(A,B)(M,S)1 series Transceiver unit is a fully-digital
transceiver designed for implementing full RS232, RS422 or RS485 2 or 4-wire
traffic signalization/communications data networks of the highest possible
reliability. A pair of FDX70E units (as FDX70EA and FDX70EB) can support
one full-duplex or half-duplex data channel. These transceivers also feature
data translation to convert between data protocols. These environmentally
hardened transceivers are ideal for use in unconditioned out-of-plant or roadside
installations.
Utilizing wave division multiplexing technology (WDM), only one optical fiber is
required between units. Linear and point-to-point topologies are also possible
using ComNet FDX72(M,S)1 models.
Bi-color (Red/Green) LED indicators are provided for rapidly ascertaining equipment
operating status. See Figure 7 on Page 4 for an explanation of LED indications.
These units are interchangeable between stand-alone or card-cage mount
configurations. See Figure A on Page 6 for mounting instructions.
See Figures 1 – 8 for complete installation details.
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FIGURE 1 – FDX70E FIBER CONNECTIONS
INSTALLATION AND OPERATION MANUAL FDX70E(A,B)(M,S)1
TECH SUPPORT: 1.888.678.9427
MULTIMODE OR SINGLE MODE OPTICAL
FIBER (DEPENDING ON MODEL)
Optical Port A in FDX70EA connects to
Optical Port B on the FDX70EB unit.
Similarly, when used as part of a drop-
insert-repeat topology with the ComNet
FDX72 series, Optical Port A must be
connected to Optical Port B of the next
unit. Refer to Figure 9 on Page 6.
BLACK
BLACK WITH WHITE STRIPE
Power Supply:
Surface Mount: 8–15 VDC @ 4W
Rack Mount: From Rack
NOTE: Remove Electrical Connector
for Rack Mount Units
FIGURE 3 – FDX70EB
REAR PANELFRONT PANEL
Data Format Switch
See Figure 5
7-Pin Data Connector
See Figures 6 & 7
LED Indicators
See Figure 8
FIGURE 2 – FDX70EA
REAR PANELFRONT PANEL
Data Format Switch
See Figure 5
7-Pin Data Connector
See Figures 6 & 7
LED Indicators
See Figure 8
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FIGURE 4 – DATA FORMAT SWITCH POSITIONS
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INSTALLATION AND OPERATION MANUAL FDX70E(A,B)(M,S)1
Switch
Located on front panel.
The first two switches set the
data type, the third sets the
Master/Remote Mode.
RS232 Data
1 2 3
RS422, Bi-Phase or
Manchester Data
1 2 3
RS485
4-Wire Data
1 2 3
Remote Mode
1 2 3
RS485 2-Wire, Sensornet
Data
1 2 3
Master Mode
1 2 3
There are two virtual data channels shared between all FDX70E or FDX72 units in a system: a Master channel and a Remote channel.
The Master/Remote Mode switch sets the data channel used by the equipment connected to each FDX70E unit in the system.
The behavior of a Master and Remote depends on the data type (set by switches 1 and 2):
RS232, RS422, RS485 (4-wire)
One unit must be set to Master Mode, and the other unit should be set to Remote Mode.
When used here is no limit to the number of Masters or Remotes in a system as long as the connected equipment can handle
multiple Masters and multiple Remotes. Most applications requiring Master/Remote communications would use just one
Master and multiple Remotes. Masters can communicate with all Remote units, but not with other Masters. Remotes can
communicate with all Masters, but not with other Remotes.
RS485 (2-wire)
The concept of Master and Remote are not used with RS485 (2-wire) mode. Rather, the Master/Remote Mode switch simply
sets which of two independent data channels each unit will use. All Masters can communicate with each other, but not with
Remotes. All Remotes can communicate with each other, but not with Masters. When in RS485 2W mode, all units should be
set to the same mode.
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TECH SUPPORT: 1.888.678.9427
INSTALLATION AND OPERATION MANUAL FDX70E(A,B)(M,S)1
FIGURE 5 – DATA CONNECTIONS
RS232
Customer
Equipment FDX70EA
Customer
EquipmentFDX70EB
RS422
Bi-phase or
Manchester
DIN(+)
DIN(–)
DOUT(+)
DOUT(–)
Data Out (+)
Data Out (–)
2-Wire
RS485,
Sensornet
DIN(+)
DIN(–)
DIN(+)
DIN(–)
Data (A)
Data (B)
Data Transmit
Data Receive
Signal Ground
DIN(–)
DOUT(–)
GND
DOUT(–)
DIN(–)
GND
4-Wire
RS485
DIN(+)
DIN(–)
DOUT(+)
DOUT(–)
DOUT(+)
DOUT(–)
DIN(+)
DIN(–)
Data Out (A)
Data Out (B)
Data In (A)
Data In (B)
DIN(+)
DIN(–)
DOUT(+)
DOUT(–)
DOUT(+)
DOUT(–)
DIN(+)
DIN(–)
Data Out (+)
Data Out (–)
Data In (+)
Data In (–)
Data In (+)
Data In (–)
Data (A)
Data (B)
Data Receive
Data Transmit
Signal Ground
Data In (A)
Data In (B)
Data Out (A)
Data Out (B)
Data In (+)
Data In (–)
Data Out (+)
Data Out (–)
FIGURE 7 – LED INDICATORS
LINK A (FDX70EA) LINK B (FDX70EB) DIN DOUT STATUS POWER
GREEN Unit In Sync Unit In Sync Data Activity Data Activity System OK. No Alarm Unit Powered Up
RED Unit Not In Sync Unit Not In Sync – – Fault Detected. Alarm Condition. –
OFF – – No Data Activity No Data Activity – Unit Powered Down
FIGURE 6 – 7-PIN DATA CONNECTOR
BIAS Current limited +5V connection. This terminal can be used as a
connection for pull-up resistors, if required.
ALARM Alarm relay output. Indicates fault conditions. The relay is internally
connected to the GND terminal when no faults are detected (i.e.
a normally closed relay). The relay circuit opens when a fault is
detected anywhere in the system.
GND: Signal ground reference. This terminal can be also be used as a
connection for pull-down resistors, if required.
DIN+/DIN- Electrical data inputs. See Figure 5 for data connections.
DOUT+/DOUT- Electrical data outputs. See Figure 5 for data connections.
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FAULT CONDITIONS
TECH SUPPORT: 1.888.678.9427
INSTALLATION AND OPERATION MANUAL FDX70E(A,B)(M,S)1
A fault condition is when a FDX70E unit system loses power or optical link. The FDX70E provides three LED indicators to help
identify when and where fault conditions occur in a system:
1. ALARM relay output
2. STATUS LED
3. LINK A and LINK B LEDs
When a fault occurs, the ALARM relay on every FDX70E in the system goes from closed to open. In addition, the STATUS LED
on every FDX70E in the system goes from solid green to solid red. The LINK A and LINK B LEDs can then be used to identify the
actual location of the fault based on their color and pattern:
Solid Green Optical link has been established between this optical port and the adjacent FDX70E over fiber.
Furthermore, every other unit in the system is also reporting that link has been established. There are no faults in
the system.
Solid Red Optical link over this port has been lost.
This could be due to a broken fiber, a bad connection, or loss of power at the adjacent unit.
Optical Fiber Optical Fiber
Optical Fiber
Optical Fiber
FDX70EAS1
Unit 1
D
FDX72S1
Unit 3
FDX70EBS1
Unit 2
D
D
FDX72S1
Unit 2
FDX70EAS1
Unit 1
D
D
FDX70EBS1
Unit 4
D
DIN/DOUT DIN/DOUT
DIN/DOUT
DIN/DOUT
DIN/DOUT
DIN/DOUT
A
B
A
A
B
B
A
B
FIGURE 8 – TYPICAL APPLICATIONS
Linear Drop-Insert-Repeat Chain using compatible FDX72 units
Point-to-Point
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© 2012 Communications Networks Corporation. All Rights Reserved. “ComNet” and the “ComNet Logo” are registered trademarks of Communication Networks, LLC.
3 CORPORATE DRIVE | DANBURY, CT 06810 | USA
T: 203.796.5300 | F: 203.796.5303 | TECH SUPPORT: 1.888.678.9427 | INFO@COMNET.NET
8 TURNBERRY PARK ROAD | GILDERSOME | MORLEY | LEEDS, UK LS27 7LE
T: +44 (0)113 307 6400 | F: +44 (0)113 253 7462 | INFO-EUROPE@COMNET.NET
INSTALLATION CONSIDERATIONS
This fiber-optic link is supplied as a Standalone/Rack module. Units
should be installed in dry locations protected from extremes of
temperature and humidity.
C1-US, C1-EU, C1-AU OR C1-CH CARD CAGE RACKS
CAUTION: Although the units are hot-swappable and may be installed
without turning power off to the rack, ComNet recommends that
the power supply be turned off and that the rack power supply
is disconnected from any power source. Note: Remove electrical
connector before installing in card cage rack.
1. Make sure that the card is oriented right side up, and slide it into the
card guides in the rack until the edge connector at the back of the
card seats in the corresponding slot in the rack’s connector panel.
Seating may require thumb pressure on the top and bottom of the
card’s front panel.
CAUTION: Take care not to press on any of the LEDs.
2. Tighten the two thumb screws on the card until the front panel of the
card is seated against the front of the rack.
WARNING: Unit is to be used with a Listed Class 2 or LPS power supply.
IMPORTANT SAFEGUARDS:
A) Elevated Operating Ambient - If installed in a closed or multi-unit rack
assembly, the operating ambient temperature of the rack environment may
be greater than room ambient. Therefore, consideration should be given to
installing the equipment in an environment compatible with the maximum
ambient temperature (Tma) specified by the manufacturer.
B) Reduced Air Flow - Installation of the equipment in a rack should be such
that the amount of air flow required for safe operation of the equipment is not
compromised.
MECHANICAL INSTALLATION INSTRUCTIONS
FIGURE A
Dimensions are for a standard ComNet™ one slot module
.156 [3.96 mm]
.313 [7.95 mm]
/
